sched: remove WAKEUP_SYNC feature
in [Kernel]
|
Prev: sched: remove NORMALIZED_SLEEPER
Next: Loongson-2F: Flush the branch target history such as BTB and RAS
From: Mike Galbraith on 11 Mar 2010 05:10 sched: remove WAKEUP_SYNC feature This feature never earned it's keep, remove it. Signed-off-by: Mike Galbraith <efault(a)gmx.de> Cc: Ingo Molnar <mingo(a)elte.hu> Cc: Peter Zijlstra <a.p.zijlstra(a)chello.nl> LKML-Reference: <new-submission> --- kernel/sched_fair.c | 4 ---- kernel/sched_features.h | 5 ----- 2 files changed, 9 deletions(-) Index: linux-2.6/kernel/sched_fair.c =================================================================== --- linux-2.6.orig/kernel/sched_fair.c +++ linux-2.6/kernel/sched_fair.c @@ -1657,7 +1657,6 @@ static void check_preempt_wakeup(struct struct task_struct *curr = rq->curr; struct sched_entity *se = &curr->se, *pse = &p->se; struct cfs_rq *cfs_rq = task_cfs_rq(curr); - int sync = wake_flags & WF_SYNC; int scale = cfs_rq->nr_running >= sched_nr_latency; if (unlikely(rt_prio(p->prio))) @@ -1690,9 +1689,6 @@ static void check_preempt_wakeup(struct if (unlikely(curr->policy == SCHED_IDLE)) goto preempt; - if (sched_feat(WAKEUP_SYNC) && sync) - goto preempt; - if (!sched_feat(WAKEUP_PREEMPT)) return; Index: linux-2.6/kernel/sched_features.h =================================================================== --- linux-2.6.orig/kernel/sched_features.h +++ linux-2.6/kernel/sched_features.h @@ -23,11 +23,6 @@ SCHED_FEAT(WAKEUP_PREEMPT, 1) SCHED_FEAT(ASYM_GRAN, 1) /* - * Always wakeup-preempt SYNC wakeups, see SYNC_WAKEUPS. - */ -SCHED_FEAT(WAKEUP_SYNC, 0) - -/* * Use the SYNC wakeup hint, pipes and the likes use this to indicate * the remote end is likely to consume the data we just wrote, and * therefore has cache benefit from being placed on the same cpu, see -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |